I would want to go to the Smithsonian in Washington, D.C. There are many museums to visit such as the American Art Museum, American Indian Museum, American History Museum, and the National Zoo. Washington D.C. is a great area with a lot of history and things to see such as the Pentagon, Washington Monument, and the White House. There is a shuttle bus available to use throughout the day. Here is a link to the Smithsonian for more information:
Smithsonian